things i think i might be happier not knowing.

[zwol]

In CSS, url() is defined as part of the lexicon, not the grammar. If you write

  .x { background-image: url(  "foo/bar"  ) }

everything from the u up to the close parenthesis is ONE TOKEN. As far as I can tell, the only effect this has on anything is to make it more difficult to implement a CSS parser.